User Gem:::Version for Node version comparisons

Simplify writing of source to Gemfile

lib/install/web.rb

@@ -1,13 +1,19 @@
 def node_version
-  ENV["NODE_VERSION"] || `node --version`[/\d+\.\d+\.\d+/]
+  version = ENV["NODE_VERSION"] || `node --version`[/\d+\.\d+\.\d+/]
+
+  return if version.blank?
+
+  Gem::Version.new(version)
 end
 
 def node_not_installed?
   node_version.blank?
 end
 
 def node_version_unsupported?
-  node_version < "20.0.0"
+  minimum_node_version = Gem::Version.new("20.0.0")
+
+  node_version < minimum_node_version
 end
 
 def apply_template!

lib/suspenders/generators.rb

@@ -20,15 +20,21 @@ def rspec_test_helper_present?
       end
 
       def node_version
-        ENV["NODE_VERSION"] || `node --version`[/\d+\.\d+\.\d+/]
+        version = ENV["NODE_VERSION"] || `node --version`[/\d+\.\d+\.\d+/]
+
+        return if version.blank?
+
+        Gem::Version.new(version)
       end
 
       def node_not_installed?
         node_version.blank?
       end
 
       def node_version_unsupported?
-        node_version < Suspenders::MINIMUM_NODE_VERSION
+        minimum_node_version = Gem::Version.new(Suspenders::MINIMUM_NODE_VERSION)
+
+        node_version < minimum_node_version
       end
     end
 

test/generators/suspenders/install/web_generator_test.rb

@@ -48,14 +48,32 @@ class WebGeneratorTest < Rails::Generators::TestCase
           end
         end
 
+        test "evaluates support for Node versions correctly" do
+          web_generator = Generators::Install::WebGenerator.new
+
+          unsupported_versions = %w[1.0.0 1.100.200 10.0.0 19.0.0 19.9.9 19.9999.99999]
+
+          unsupported_versions.each do |unsupported_version|
+            Generators::Install::WebGenerator.any_instance.stubs(:node_version).returns(unsupported_version)
+
+            assert_predicate web_generator, :node_version_unsupported?, "Node version #{unsupported_version} should not be supported"
+          end
+
+          supported_versions = %w[20.0.0 20.1.0 20.100.200 50.0.0 100.0.0]
+
+          supported_versions.each do |supported_version|
+            Generators::Install::WebGenerator.any_instance.stubs(:node_version).returns(supported_version)
+
+            assert_not_predicate web_generator, :node_version_unsupported?, "Node version #{supported_version} should be supported"
+          end
+        end
+
         private
 
         def prepare_destination
           touch "Gemfile"
 
-          File.open("test/dummy/Gemfile", "w") do |f|
-            f.write('source "https://rubygems.org"')
-          end
+          File.write("test/dummy/Gemfile", 'source "https://rubygems.org"')
         end
 
         def restore_destination